Machine for bending angle-irons.



No. 811,975. PATENTED PEB. 6, 1906.

- W. VOLLMER.

MACHINE FOR BBNDING ANGLE IRONS.

APPLIUAToN FILED MAR.8,1905.

2 SHEETS-SHEET 1.

ist

PATENTBD PEB. 6, 1906.

W. VOLLMER. MACHINE FOR BBNDING ANGLE IRONS.

APPLIUATION FILED MAR.8, 1905Y 2 SHEETS-SHEET 2.

UNITED STATES AEENT OFFICE.

,ne entre.

Specification of Letters Patent.

Patented Feb. 6, 1906.

Application filed March 8, 1905 Serial N0. 249,059.

Be it known that I, WILHELM VOLL'MER, a citizen oll the United States, residing in Winfield, in the county of Queens and State of New York, useful Aimprovements in Machines lPor BendingI .\ngleirons, of whiehthe following is a specification.

i 'lhis invention relates ,to improvements in bending-rnach1nes ol the general type shown 'in United States Letters .Patent heretofore granted to ine and numbered and dated as Follows: No. 690,858, May 13, 1902; No. 700,282, September 16, 1902; No. 709,283, September 16, 1002.

The objects of the invention are to provide improved means for supporting the metal dni-ing bowling and improved means for operating the bending devices.

"llie invention consists in certain combinations ol" parts and in certain details of consi i'nciion, which will be fully described hereinnl'ier and finally pointed out in the claims.

in theY accompanying drawings, Figure 1 is a Side elevation of my improved machine. Fig. 2 is a lop View ofthe same. Fig. 2 is a detail vertical section through ay portion of the machine on line 2? 2, Fig. ,2, With arts omitted. Fig. 3 is a kplan view, party in horizontal section, on line 3 3, Fig. 1. Fig. 3 is a detail elevation of' a portion of the Inachine. Figs. 4 and 4 are plan views showing certain modifications in supporting devices ior the iron, Fig. 4 being partly in horizontal section. Fig. 5 illustrates the ap li,- cation of a bending-block for use in bending angle-iron in outward direction. Fi 6 is a perspective view showing an inwardly-bent angle-iron and an outwardly-bent iron; and Fie. 7 shows in top View and side elevation a bending-block such as seen in place in Fig. 45.

Similar letters of reference indicate corresponding parts.

Referring to the drawin s, A indicates the bed of the machine, which is supported on suitable legs a and provided a longitudmal groove or guide-slot a and with guideways a2 at each side of the slot at the under side of the bed. -U on the bed .is mounted a guide-block B, to w ich is secured a topplate C. Said guide-block and top plateale secured to the bed A by bolts n or )y any other suitable means. bed A and top plate C4 is pivoted, b means of suitable trunnions it', a

have invented certain new and 'same with a lcoiiar d Vblock by means of eyebolts angle- A nuts b above at one end withv ladapted to Between thebendingever D.

E indicates aformin bl`ock. Said blockis mounted on the be and provided with a downwardly-extending shank e and a flange e', adapted to slide in the guidewa s a, whereby the`block.is uided. For a justing and retaining theggui' e-block in position a screw d is provided, which engages a threaded sleeve al', secured to the lower ortion of theblock E. Said screw passes t ough a bearing d of the bed and 1s provided at one side of `.the and at the other side with a hand-wheel d4. To the forming-block is secured an abutment g for the iron beine bent. Said abutment is preferably secure( by means of screws g', whereby the same is removable, so that a plate of different size or form may be substituted, according to the dimensions of the metal being bent. The point of said late g is preferably slightly rounded, as indicated, so as to provide room for the metal upset at the bend.

F indicates a presser-plate. hinged at its rear portion to b, whereby verti cal adjustment ofthe presser-plate at its rear portion is permitted. Said eyebolts pass through slots m5 in the rear portion `of the formin -block, whereby longitudinal adjustment o the presser-plate is permitted. The presser-plate F is rovided with a' forwardlyextendin arm j' aving at its forward end a suitable andle whereby the presser-` plate may be manipulated by the operator so as to exert the desired amount of ressure on the horizontal flan e othejiron eing bent, said flange during t e operation .of bending beinlg thereby clamped between the forming-bloc and the presser-pla I For securing the desired pressure of the presser-plate and for retainingthe same'in position means are rovided comprising standardstt, Fi .3,t readed-at their lower ends and secure adjustably in the bed A by and below the bed. Said standards support attheir upper portion a rock-shaft t2, carrying an eccentric or cam t3, bear upon the arm of the Said plate is presser-plate.

rocleshat the cam is caused to bear upon the the forming-` operating-hand e t isat'-v tached to said rock-shaft." By rotating vthe IOO arm f and thereb, `de ress the presser-plate.

The' operator is t ere yrenabled to control minutely the pressure exerted. The friction between the cam and armis4 normally'suiicient to retain the arts inthe'position` in which they are set by the operator; but in .For aiding in the prompt return of the shaft intoposition the outer end of. the same is preferably rounded orpointed, asindicated. Abrace til exten'ds between the standards t t', whereby to strengthen the same. To' guide the presser-plate while being depressed and to i lock it at its forward portion against lateral movement after depression, said brace tais bending-lever provided with a recess t7, adapted to receive the arm f when the same is depressed. The presser-plate is automatically raised when released and. retained in raised inoperative position until again depressed'by means of a weight m,

connected with the arm f of the resser-plateby a cord m passing over a puley 'm2, 'supported lon a post ma, rising from the forming-block. For securin the metal -being bent to the and for assisting in the suport ofthe metal a rest 1l is provided, extendlng laterally from the leverl adjacent the outer portion or handle` p of the same, said restl being guided duringA operation ofthe le lver along a depressed curved n (giuideway r at the front portion of the bed an thickness that the upper surface of t e rest 1" 'is at substantially the same horizontal plane withthe upper surface of the bed. Said rest r carries a hand-clam comprising a cam r2,

provided with a hand e/r, adapted to be operated in the direction of the arrow, Fi s, 2

and 3, for clamping the metal to be entbetween said clamp and the bending-lever. The metal is thereby firmly held against longitudinal movement toward the outer end of the bending-lever. Said rest'may be cast integral with the bendin -lever or formed separatel therefrom and. olted or. otherwise secure thereto. For locking the metal against movement in the opposite. directionan adjustable stop may be provided, as indicated in Fig. 5, in which bs represents an arm projecting'rearwardly from the guide-block B, and b a shoe adjustable on said arm and extending into the path ofthe metal clamped for-bending. l 4 f For sharply bending angle-iron the guideblock'B is provided with a lug or projection s, (clearly shown' in Figs. 3, 4, and 5,) said lug extending between the trunnions of the bending-lever to approximately the axis of the same. The guide-block is recessed back from this point, providin a recess for receiving the inner end of sai lever. The projection s thereby affords a support between when thus withbein of such l the .trunnions against outward'bending ofthe metal.

For supportin the angle-iron being bent the forming-bloc Eis provided at its forward portion with a laterally-swinging bending-nger 7i, extending horizontally therefrom, and provided at its outer end with a foot h', bearing upon the bed-plate for sup-.

porting the same, said foot being vadapted when the finger is swung into closedposition to enter a recess h2 in the Jforming-block. The iinger h is pivoted in a recess of the formingblock, so that its upper surface is flush with the upper surface ofthe forming-block. The presser -plate F. isprovided at its vforward portion with a swinging b ending-iinger h3;

adapted to coact with the swinging finger h and arranged in a recess 'of the presser-plate, so that its lower surface is approximately iush with thev lower ,surface of thev presserplate.- Said iingers are preferably pivoted on the median line of the machine-i. e., a line extending through the axis of the' trunnions and the point of the forminglange ofthe an le-iron is retained between the upper face o the ringer on the formingblock and the lower face of vthat on the presser-plate while the lever .D is moving from. the position shown'in full lines in Fig. 4 [to that shown in dotted lines. As the bending-lever describes this movement these bending-fingers are of course swun back laterally against the forming-block an presser-plate, acting in the capacity of a swinging support for said fiange.- During this movement, in which this .langewuld buckle in a vertical direction-viz. upwardly or downwardly-if no support were rovided, it is thus firmly retainedand such buckling entirely prevented. For bending iron having a horizontal iiange of greater width than asingle bendin -in er a plurality of such fingers may beemp oye as indicated at h h* in Fig. 4, and the presserplate ma be similarly provided with a-pluralityof ending-fingers E,In Fig. 4 E2 indicates the forming-block.

For securing a sharp bend the bending-iinger may be located back ofthe bending-point c vof the forming-block, as indicated in Fig. 4, and thereby a sharp poi-nt secured ,for the formingblock. Such construction lmay be employed to advantage when bending small sizes of angle-iron. When desired, the bending-lever may be of the full Width of the trunnions, as indicated in Fig. 4a. In this figure, E is the forming-block; B,the guide-block; D the bending-lever, and g2 the abutment.

block..- During the bending operation the horizontal Fig. 6, indicates an inwardly-bent an-v le-iron. For bending an le-iron in outward irection, as indicated at ,Fig 6, a bendingblock u is provided, comprising two closel hingedportions of approximatelythe hei t and breadth .of the lronto be bent. or bending, the angle-iron is inserted in the mailan c ol' the 'iron heilig at the bottom u en the )ed-plate and the vertical flange against the iormingblock. The bendingblock is placed upon the horizontal liange with the o pivot-11, of said block arranged on the median i verand the forming-block.

presser-plate F Ares'serlate is ne of -the maehinebetween the bending-le- For retaining the bendin -block in be provide u, ada ted to engage in a recess u* in the guide-b ook B. Said recess may be filled when the bendingblock is not employed by a small plate a5, secu. ad in said recess by screws or other means.

iihen bending angle-iron outwardly, as described, the inner portion of the guide-slot a', which is in such case ex 'osed between the forming-block and guide-b ook, is preferably closed by a removable late k, Fig. 2a.

When bending ang e-iron inwardly, the is normally so positioned that its front edge is in line with the front edge of the forming-block; but when bending angleiron outwardly, as indicated in Fig. 5, said previous to bendin moved ongitu in ally in forward direction y shifting the eyebolts I) forward in the recesses m5,

position with a projection `so that the presser-plate projects beyond the 3Q forming-block and presses upon the vertical Harige of the iron, thereby retaining the metal during bending.

the nuts b of the standards t t `adjustment.

For vertically positioning the )lesser-plate may be operated, thereby affording a minute and exact This adjustment, in connection with the like ad'ustment of the presserplate at its rear end )y means of the nuts of the eyebolts b, provides'ineans for retaining the parallelism `of the 4plate and formingblock when adjustin v for wear and for the bendinu of metal of different dimensions,

To t ie bending-lever D is removably attached, by means of screw-'bolts c3, a segmentgear p. Said gear meshes with a Worm p2, mounted on a worm-shaft p3, supported in suitable blocks b p5 and rovided at one end with a fly-wheel p* an with two loose pulleys b b and an intermediate ti ht pulley 6". To the pulleys may be applie a straight and a crossed belt for thereby operating the wormvshaft in either direction in the usual manner. The segment-gear p is preferably of such dimensions that its teeth are out o engagement with the Worm at each end of the movement ofthe bending-lever. Whenit is desired to operate the bending-lever by power, the` belts are so shifted as to rotate the shaft p inforward direction, and then the bending-lever D isswung by the operator in bending direction until the tooth 'of the gear p engages the rotatin worm. When the segment arrives at' the en of its movement, thel last tooth passes out of engagement with lthe worm, and thereby opposite direction.

' bend ing the same may non, round iron, or

; means, oo perating with as' to normally rest in inoperative first.

the bending-lever is brought to rest. Tho bent iron having been removed, thi` bolts arc shifted so as to rotate the `worm-sluil't in thc 'lhc operator then moves t v1e bending-lever in return direction until the end tooth of the segment p engages the worm, when the lmnding-lovcr 'is returned to position b f the operation of the worm, thc first too'ti oi' thc segment passing finally out oi' mesh with the same.

The n'uichine may be o )erated by hand b v means ofa handle e', applied to thc ily-wheel p, o-r the segment p may bo removed and the bending-lever operated directly by moans of its handle p. i

For aiding in the sharp bending oi angleiron a stri of :Hat iron c* may bo arranged in front of tie forming-block, as indicated'in Fig. 4, whereby an angular bending-poil) t c is produced in advance of the bending-finger, said strip heilig held in position by the clamping of the same together with the angle-iron between the forming-block and the guideblock B. o

Theonachine is not limited in use to angleiron, but may be employed for bending flat metal of any other suitable shape.`

Having thus described my invention, I claim as new and desire to secure'by Letters Patent.-

1. In a machine for bending angle iron, the combination of a bed, a forming-block `mounted thereon, means fonbending the angle-iron against the said block, and a presser- `plate hinged to said forming-block and adjustable t ierealong at its hinged end.

2. In a machine for bending an le-iron, a bed, a forming-block `mounted t ereon, a guide-block also mounted thereon, a bending-lever a presser-plate hinged to said forming-block, and means mounted on said bedhindependent of said uide-block, for adj usting the free end of saigpresser-plate. V3. In a machine forvbendinglangle-iron, a bed, a forlningblock mounted thereon, said forming-block for bending the angle-iron a ainst the same, a presser-plate hin ed to sai forming-block, means for locking tie free end of said presserplate in operative position, and automatic means for returning said presser-plate to in` Ioperative position upon the release of said ocking means. i

4. In a machine for bending angle-iron, a bed,` a formin vlook mounted thereon, means for ben ing the angle-iron against said forming-block, a presser-plate hinged to said. `forming-block and counterweighted so osition, of said and means for locking the free en presser-plate in operative osition. l

, 5. In a machine for ben in angle-iron, a

forming-block, means vfor ben 'ng Ithe angle- Airon against the same, a presser-plate hinged IOO IIe.

to said forming-block, standards, a shaft carried b said standards and shiftable into and out o the path of said presser-plate, and

means on said shaft to position said presserplate;

6. In a machine for bending angle-iron, a forming-block, means for bending the iron against the same, a presser-plate hinged. to

i I said forming-block, standards, and a shaft journaled in said standards and provided With a cam adapted to engage ythe free end of v said presser-plate, said shaft being shiftable y into and out of the path thereof.

7. A machine for bending angle-iron comprising in its construction a forming-block, means for bending the angle-iron against the same, a presser-plate hinged to said :formingblock7 standards, a brace extending between said standards, and a shaft journaled insaid standards and carrying a cam adapted to coi operate with said brace in positioning the ree end of said presser-plate. l g

8. A machine for bending angle-iron comprising in its construction a forming-block,

means for bending the iron a ainst the same, a presser-plate hinged to sai forming-block, vertically-adjustable standards, and a shaft carried by said standards and provided with means to position the free end of said presserplate. y,

9. In a machine for bending an le-iron7 a bed a forming-block mounted t ereon, va ui e-block likewise mounted thereon, a ending-lever ivoted laterally to said guideblock, and a ending-finger carried by said forming-block for lretaining the horizontal iianve of the angle-iron against buckling in a vertlcal direction.

10. In a machine the combination of a forming-block, a pivoted bending-lever coperating therewith, and a iinger pivoted to said forming-block in j the same plane as said bending-lever is pivoted, and servin to maintain one lange of the iron against uckling.

11. In a machine for-bending angle-iron,

forbending angle-iron, f

the lcombination of a forming-block, afsnpeiposed presserlate, a bending-lever coperating with sai block and plate, and a bucklepreventing finger pivoted to said presserplate and movable in the same direction as said bending-lever.

12. In a machine for bending angle-iron, a formin -block, a superposed presser-plate, means or bending the iron against said forming-block, and coperating means carried by vsaid forming-block and presser-plate for preventing the buckling of one flange of the angie-iron while the same is being bent.

13. In a machine for bending angle-iron, the combination of a formin -block5 a superposed presser-plate,'a lateralIy-pivoted bending-lever, and laterally-swinging buckle-preventing iingers carried by said presser-plate and forming-block.

14. In a machine for bending angle-iron, a forming-,block having a laterally-swinging buckle-preventing finger the upper face of yWhich is flush with that of said forming-block,

a presser-platesuperposed on said formingblock and carrying asimilar finger adapted to coperate with the iirst, the lower face therea recess at the formin 'end'7 a laterally-pivoted bending-lever, a uckle-p'reventing iinyger laterally pivoted to said forming-block,

and a foot carried by said finger and engaging the bed, said foot bein movable into the recess of said forming-bloc In testimonyL that I claim the foregoing as my inventionl have signed my name in presence of tWo` subscribing witnesses.

WILHELMl VOLLMER.

Witnesses:

JOSEPH H. NILEs,- PAUL GOEPEL. 

